redraw it maybe? thinking about the placement of the very arm that is looking like some kind of elephantine proboscus...
I'd also brighten up the BG a bit... and drop the brightness of that eye... (it doesn't help as it's so distracting to whole piece)
Have you drawn the creature NOT in silohette? It's a misnomer that you may think it's easier to draw things as just outlines, but in reality the brain fills in the details and if things don't sit right, then they don't sit right and you will instinctively see this...
perhaps you're worried about starting again...? probably because you've put a lot of effort into this... but in my experience - I often find that the second attempt at an idea I start to hone it... and then the third attempt works and I managed to solve all the problems by not beeing worried about going 'back to the drawing board' and starting again...
be brave... bite the bullet and go back to the drawing board.